Black Hole
$19.50
The Black Hole is a solid rubber disk that is concave on the bottom, tacky to the touch when clean, and sticks to most but not all (clean) floor surfaces. The cup for the tip is 5/8″ in diameter and 3/8″ deep which only matters if you keep a rubber tip over your sharp endpin tip. There is a hard plastic liner to protect sharp tips (like New Harmony’s) from piercing the rockstop. Remember to renew the tacky surface by a warm water wash when dirt and particles stuck to it prevent it from slipping.